Acutance

Acutance is something that helps us see the edges of things more clearly. Imagine drawing a picture with a crayon on a piece of paper. If you use a dark crayon, the lines will be really easy to see. But if you use a light crayon, the lines might be harder to see.

Acutance is kind of like that -- it helps us see the lines and edges of things in a picture. When we take a picture with a camera, there are different things that can affect the acutance. For example, if the picture is blurry, the edges might not be as clear. But if the picture is really crisp and clear, the edges will be easier to see.

So, basically, acutance is a way of making sure we can see the edges of things in a picture. It helps us see details more clearly!